<domain gmail.com> virtual-mta vmta-gmail max-msg-rate 200/h </domain>
max-msg-attempts 6 # Typical: 6 attempts over 2-3 days.
Rate limiting is a feature that helps prevent abuse and overload on your email server. PowerMTA provides a rate limiting system that allows you to limit the number of emails sent within a specified time frame. powermta configuration guide top
<domain outlook.com> max-smtp-out 10 # Lower than Gmail. max-msg-rate 5/s max-msg-per-connection 20 use-starttls always # Microsoft penalizes rapid retries initial-pts 300 # 5 minutes on first temp fail. max-pts 7200 # 2 hours max penalty. # Honor their Junk Mail Reporting honor-dmarc-results true </domain>
: Sets the hostname of the server (e.g., ://yourdomain.com ). log-file : Defines the path for logs. <domain gmail
Use these tools to verify all DNS records are properly configured:
: Use username/password authentication (SMTP AUTH) if injection occurs over public networks. <domain outlook
smtp-source-ip 192.0.2.10 host-name ://yourdomain.com smtp-source-ip 192.0.2.11 host-name ://yourdomain.com virtual-mta mta_marketing # Add extra marketing IPs here to load-balance traffic Use code with caution. Key Considerations